Chantasiriwan, Somchart. “Determination of Free Surface in Steady-State Seepage through a Dam With Toe Drain by the Boundary Element Method”. Science & Technology Asia 16, no. 4 (October 20, 2015): 1–7. Accessed May 7, 2024. https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/41197.